Electroweak corrections to hadronic event shapes and jet production in annihilation

Denner, Ansgar; Dittmaier, S.; Gehrmann, Thomas; Kurz, Christian

doi:10.1016/j.nuclphysb.2010.04.009

Cited by 33 publications

(37 citation statements)

References 143 publications

(170 reference statements)

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“…This difference is always covered by the hadronization uncertainty. In [49] electroweak O(α 3 α S ) corrections to event shapes are calculated. They comprise effects of initial state radiation, which in our approach are corrected for by Monte Carlo models.…”

Section: Fit Proceduresmentioning

confidence: 99%

Determination of α S using OPAL hadronic event shapes at $\sqrt{s} = 91\mbox{--}209~\mathrm{GeV}$ and resummed NNLO calculations

Abbiendi¹,

Ainsley²,

Åkesson³

et al. 2011

Eur. Phys. J. C

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Hadronic event shape distributions from e + e − annihilation measured by the OPAL experiment at centre-ofmass energies between 91 GeV and 209 GeV are used to determine the strong coupling α S . The results are based on QCD predictions complete to the next-to-next-to-leading order (NNLO), and on NNLO calculations matched to the resummed next-to-leading-log-approximation terms (NNLO+ NLLA). The combined NNLO result from all variables and centre-of-mass energies is The completeness of the NNLO and NNLO + NLLA results with respect to missing higher order contributions, studied by varying the renormalization scale, is improved compared to previous results based on NLO or NLO + NLLA predictions only. The observed energy dependence of α S agrees with the QCD prediction of asymptotic freedom and excludes the absence of running.

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Section: Fit Proceduresmentioning

confidence: 99%

Determination of α S using OPAL hadronic event shapes at $\sqrt{s} = 91\mbox{--}209~\mathrm{GeV}$ and resummed NNLO calculations

Abbiendi¹,

Ainsley²,

Åkesson³

et al. 2011

Eur. Phys. J. C

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“…To this end we follow closely the procedure in refs. [35,58] and relate D q i →γ to the parametrisation D ALEPH, MS q→γ measured at ALEPH [60]. We find The µ F -dependence of the photon fragmentation function cancels by construction.…”

Section: Jhep01(2015)094mentioning

confidence: 81%

“…Following refs. [35,58] we eliminate this singularity by discarding events which contain a jet consisting of a hard photon recombined with a soft parton a (a = q i ,q i , g): photonic jets with z γ = E γ /(E γ + E a ) above a critical value z cut γ are attributed to the process pp → ℓ − ℓ + j + γ and therefore excluded. This event definition is still not IR-save because the application of the z γ cut to recombined quark-photon jets spoils the cancellation of final-state collinear singularities with the virtual photonic corrections.…”

Section: Real Corrections 331 Gluonic Processesmentioning

confidence: 99%

See 1 more Smart Citation

Electroweak corrections to lepton pair production in association with two hard jets at the LHC

Denner

Hofer

Scharf

et al. 2015

J. High Energ. Phys.

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Abstract:We compute the next-to-leading order corrections of O α 2 s α 3 to the hadronic production of two oppositely charged leptons and two hard jets, pp → jjℓ − ℓ + , using Recola and Collier. We include electroweak and QCD corrections at the given order and all off-shell effects. We provide detailed predictions for the LHC operating at 13 TeV and obtain per-cent-level corrections for the total cross section. For differential distributions we find significant non-uniform distortions in high-energy tails at the level of several ten per cent due to electroweak Sudakov logarithms and deformations at the level of a few per cent for angular variables.

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“…Following Refs. [50,89] we eliminate this singularity by discarding events which contain a jet consisting of a hard photon recombined with a soft parton a (a = q i ,q i , g) taking the photon-jet energy fraction z γ = E γ /(E γ + E a ) as a discriminator. Photonic jets with z γ above a critical value z cut γ are attributed to the process pp → Z + 1 jet + γ and therefore they are excluded.…”

Section: Real Correctionsmentioning

confidence: 99%

Recursive generation of one-loop amplitudes in the Standard Model

Actis

Denner

Hofer

et al. 2013

J. High Energ. Phys.

173

216

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Abstract:We introduce the computer code Recola for the recursive generation of tree-level and oneloop amplitudes in the Standard Model. Tree-level amplitudes are constructed using off-shell currents instead of Feynman diagrams as basic building blocks. One-loop amplitudes are represented as linear combinations of tensor integrals whose coefficients are calculated similarly to the tree-level amplitudes by recursive construction of loop off-shell currents. We introduce a novel algorithm for the treatment of colour, assigning a colour structure to each off-shell current which enables us to recursively construct the colour structure of the amplitude efficiently. Recola is interfaced with a tensor-integral library and provides complete one-loop Standard Model amplitudes including rational terms and counterterms. As a first application we consider Z + 2 jets production at the LHC and calculate with Recola the next-to-leading-order electroweak corrections to the dominant partonic channels.

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Electroweak corrections to hadronic event shapes and jet production in annihilation

Cited by 33 publications

References 143 publications

Determination of α S using OPAL hadronic event shapes at $\sqrt{s} = 91\mbox{--}209~\mathrm{GeV}$ and resummed NNLO calculations

Determination of α S using OPAL hadronic event shapes at $\sqrt{s} = 91\mbox{--}209~\mathrm{GeV}$ and resummed NNLO calculations

Electroweak corrections to lepton pair production in association with two hard jets at the LHC

Recursive generation of one-loop amplitudes in the Standard Model

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